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A chord AB of length 30 cm of the outer of two concentric circles touches the inner circle, whose radius is 8 cm. Find the radius of the outer circle.

Class 10Tangent Lengths and IncirclesGeometry
  • A15 cm
  • B17 cm
  • C22 cm
  • D23 cm

Step-by-Step Solution

Half-chord AP = 15 cm and OP = 8 cm with OP ⊥ AB. cm.
Answer: B) 17 cm

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